首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A radical new bicycle had its first public showing at the National British Cycling Championships in Shrewsbury last weekend. Bas
A radical new bicycle had its first public showing at the National British Cycling Championships in Shrewsbury last weekend. Bas
admin
2011-03-26
81
问题
A radical new bicycle had its first public showing at the National British Cycling Championships in Shrewsbury last weekend. Based on the gold medal- winning design from the Barcelona Olympics, it is the first commercial mountain bike made of a single piece of carbon fibre.
Bicycles for amateurs have up to now been made of steel, aluminum or magnesium tubes welded together into the conventional "A-frame" shape. But last year, the British competitor Chris Boardman set world records while winning titles in the Olympic cycling pursuit events on a custom-built, carbon-fibre bicycle with lower weight and wind resistance than standard models. Because carbon fibre is born light and extremely strong, it does not need the A-frame shape, saving further weight Carbon fibre can also be moulded in a single piece, avoiding the weakness of welds.
The new bike, which will cost between $ 2000 and $ 3000 when it reaches the shops next month, has the same advantages as the Olympic model, it weighs about 11 kilograms, a saving of 1.5 kilograms on metal frames With no crossbar, it has a lower centre of gravity, making it easier to use in race conditions. "When you’re doing some aggressive riding, you throw the bike about form side to side," explains Eddie Eccleston, director of British Eagle, a British bicycle manufacturer based in Powys, Wales, which is marketing the bikes. "The low centre of gravity! gives you better control."
The frames are being made in the US for British Eagle by SP systems in Camarillo, California, which has clients in the aerospace industry. "This is aerospace technology brought into cycling by enthusiasts," says Eccleston. When professionals tested racing versions of the bike before the Tour de France, they were quicker than metal versions by up to 3 seconds per kilometre.
The new design has no struts between the saddle and the back wheel; instead, the frame’s flexibility can be "tuned" to individual tastes by changing the mixture of Kevlar fibre and carbon fibre in the back wheel strut, allowing up to 5 centimetres of movement.
The carbon-fibre design has a lower centre of gravity and smoother back-wheel suspension than conventional bikes.
According to the context, "bicycles for amateurs" at the beginning of the second paragraph refers to bicycles ______.
选项
A、that people buy only for riding in their daily life
B、that are bought by amateur cyclists who like cycling as an exercise
C、that are built for customers in general
D、that non-Olympic competitors use
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/9cBO777K
0
考博英语
相关试题推荐
CommercialBanksCommercialbanksplayanimportantrole(29)national(30)。(31)theendofMay1995,Chinahas1
BadnewsforbankersTherewasgreatuncertaintytodayaboutthefutureforemployeesofLancetBankfollowingpublicati
ThisWorkingLifeByMaureenDowdIntheworldofbusiness,itisnotalwayseasyforwomentodothe(29)thingsasmen.
HowtosetpricesThemethodsadoptedinpricesettingarecrucialtoanybusiness.Whensettingprices,remembercostswill
You’rebusyfillingouttheapplicationformforapositionyoureallyneed,let’sassumeyouonceactuallycompletedacoupleo
由小学到中学,所修习的无非是一些普通的基本知识。就是大学四年,所授课业也还是相当粗浅的学识。大学的研究所才是初步研究学问的所在,在这里做学问也只能算是粗涉藩篱,注重的是研究学问的方法与实习。学无止境,一生的时间都嫌太短,所以古人皓首穷经,头发白了还是在继续
Mollyhasalwaysbeena(n)______child;shebecomesilleasily.
Likeanyother(constant)repeatedaction,speaking(hasto)belearned,butonceit(islearned),itbecomesagenerally(uncon
ItseemsincredibletomethatLatinisnottaughtinschoolsasamatterofcourse,especiallyinacountrythatisforeverlam
IamsureIcan______himintolettingusstayinthehotelforthenight.
随机试题
甲投资公司以住宅小区需建设配套设施的名义,将公司旗下的住宅小区房屋作抵押,从银行贷款1亿元,年息5%,然后将该款转借乙公司使用,乙公司除负担银行5%的利息外,还须付给甲公司3%的使用费。甲公司的行为是:
国内某建筑公司在境外承包了一项建筑工程,取得工程价款3000万元;在境内承包了一家外商独资企业的建筑工程,取得工程价款1500万元;建设一幢办公楼自用,价值1000万元。建筑业营业税率为3%,该建筑公司应纳营业税为( )万元。
国内航线持全票、乘坐公务舱旅客的免费行李额为()。
古人的座次有严格的尊卑之分,鸿门宴中的项王、项伯东向坐,亚父南向坐,沛公北向坐,张良西向侍。其中,座次最卑的是()。
新闻述评
目录列表框Path属性的作用是
Youwillhearaconversationthroughaphone.Foreachquestion(23-30),markoneletter(A,BorC)forthecorrectanswer.After
都市寸土千金,地价炒得越来越高,今后将更高。拥有一个小小花园的希望,对寻常之辈不啻是一种奢望,一种梦想。我想,其实谁都有一个小小花园,这便是我们的内心世界。人的智力需要开发,人的内心世界也是需要开发的。人和动物的区别,除了众所周知的诸多方面,恐怕
Itisbecauseofariseinairfares_____they’vesurchargedus10%onthepriceoftheholiday.
Thereis,writesDanieleFanelliinarecentissueofNature,somethingrotteninthestateofscientificresearch—anepidemico
最新回复
(
0
)